-9+20r=5(4r-9)

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Solution for -9+20r=5(4r-9) equation: 



-9+20r=5(4r-9)

We move all terms to the left:

-9+20r-(5(4r-9))=0



We calculate terms in parentheses: -(5(4r-9)), so:

5(4r-9)

We multiply parentheses

20r-45

Back to the equation:

-(20r-45)



We get rid of parentheses

20r-20r+45-9=0

We add all the numbers together, and all the variables

36!=0

There is no solution for this equation

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